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Leopard Technical Q&As: Security
Mac OS X provides a number of authorization, authentication, and cryptographic services that developers can use to build security into their applications. These interfaces include an Objective-C API that provides authorization services and user interfaces for managing authorization, certificates, and keychains, plus several C APIs that can be called from Cocoa applications to provide lower-level security and secure networking services.

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Describing the kSecTrustResultUnspecified error. (HTML)
QA1360: Explaining the semantics behind the kSecTrustResultUnspecified error returned by the Security APIs.
2007-02-05
Security Framework Error Codes (HTML)
QA1499: Explains how to interpret errors returned by the Security Framework with an overview of Security error handling.
2006-11-16